Botanic Garden hosts fantastical train exhibit

Some of the tracks in the United States Botanic Garden exhibit form bridges from one part of the room to another, using holiday decorations to create the appearance of suspension cables. (WTOP/Heather Brady)

There also is a historic replica of the National Mall, with architectural details made from all-natural plant materials. The West Gallery features one of Washington’s largest decorated indoor Christmas trees.

The holiday exhibits run through Jan. 1, 2013. Admission to the conservancy, where the exhibits are located, is free. Conservancy hours are 10 a.m. to 5 p.m. daily. For more information, visit the garden’s website.